PTEROMALIDAE OF N.W. EUROPE 591 



? Pteromalus Ection Walker, 1845 : 262, $. 



Pteromalus Hyrtacus Walker, 1848 : 127, 214, $, syn. n. 



Etroxys elongatus Thomson, 1878 : 100, <$ $, syn. n. 



Type material (Walker types bear a Waterhouse label). 



Pteromalus compressus Walker. Syntypes, 2 $. LECTOTYPE, the second 

 specimen. 



Pteromalus fuscescens Walker. Syntypes, 2 $. LECTOTYPE, the second 

 specimen ; Waterhouse label " Hetroxys fuscescens Walker ". 



Pteromalus ection Walker. One male, LECTOTYPE ; I think it is probably the 

 male of compressus. Dalla Torre (1898 : 122) listed this species as " eciton Walk." 

 in error. 



Pteromalus hyrtacus Walker. One female, LECTOTYPE. 



Etroxys elongatus Thomson. Syntypes on 28 pins. LECTOTYPE, a female 

 labelled " Rsio " [Ringsjo] and remounted by A. Jansson. 



Widely distributed in Europe ; in Britain the commonest species of this genus. 

 Biology. Unknown. Imagines Apr. -Aug. 



Holcaeus breviusculus (Thomson) comb. n. 



Etroxys breviusculus Thomson, 1878 : 102, $. 



Type material. Syntypes. 3 $. LECTOTYPE labelled " Bh." [Bohuslan] 

 and " Bhn " [Boheman]. 



Sweden ; only the type material known to me. It is very close to compressus 

 (Walker) and might be a form of it but as slight differences are present I retain it 

 tentatively as a valid species. 



Biology. Unknown. 



CRICELLIUS Thomson 



Etroxys subgen. Cricellius Thomson, 1878 : 88, 102. Type-species : C. decipiens Thomson, by 



monotypy. 

 Cricellius Thomson ; Ashmead, 1904 : 313, 314. 

 Cricellius Thomson ; Schmiedeknecht, 1909 : 309, 310, 312. 

 Cricellius Thomson ; Kurdjumov, 1913 : 6. 

 Cricellius Thomson ; Nikol'skaya, 1952 : 225. 

 Dibrachella Boucek, 1954 : 55- Type-species : D. gracilenta Boucek, by monotypy and original 



designation. 

 Cricellius Thomson ; Boucek, 1958a : 401. 

 Cricellius Thomson ; Peck et al., 1964 : 54. 



Boucek himself (1958a : 401) synonymized his genus Dibrachella with Cricellius 

 Thomson. 



This genus is extremely close to Holcaeus Thomson and may eventually have to 

 be united with it. Females of the two genera may be distinguished easily, but the 

 limits between certain males of Holcaeus and Cricellius are very slight. 



